The United States Postal Service recently released their 2016 Household Diary Study, which, since 1987, has set out to collect data on household use of mail and how that use evolves over time. The survey “collects household information on demographics, lifestyle, attitudes toward mail and advertising, bill payment behavior, and use of the Internet and other information technologies.” It’s a long, comprehensive, and interesting (really!) document. We pulled three facts worth noting about transactions mail.